Boosting electrical conductivity of textiles via fabrication of silver nano-ribbons using the fiber templates

This research has accomplished an exceptional achievement to synthesize metallic nano-ribbons. A simple and fast spray method has been used to fabrication the metallic ribbon-shape nanostructures on the cotton fabrics. In fact cotton fabrics can act as a good template directing the shape of nanostructures. The method to achieve this end has been reported and discussed. The SEM micrographs demonstrated the nano-ribbon fabrication. Evaluation the electrical conductivity disclosed that electrical resistance of fabrics containing the silver nano-ribbons has been decrease about 7640 times as compared to untreated one. In fact electrical resistance has been declined from 6.53×109.cm-1 on treated fabrics to 8.55 ×105.cm-1 on untreated fabrics. Consequently, applying this technique decreases the electrical resistance by four orders of magnitude. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2063

Engineering of Wool Nano-clay Functionalization for Different Approaches

The research has conducted finishing of wool fabrics by clay nano-layers and its effect on the felting properties of treated wool fabrics. Natural and modified montmorillonite used to modify the fabrics. To this end, the knitted wool fabrics have been treated under ultrasound. Then, the samples have been subjected to felting operation with two acidic and alkaline conditions. Felting properties of samples were investigat-ed and compared with control samples. According to the results, felting properties were affected by nano-clay types and pH. Therefore, nano-clay finishing can increase felting potential, or conversely, increase re-sistance to shrinkage according to pH of felting solution and nano-clay surface characteristics. Thus, in ba-sis of ultimate goal the required condition can be controlled to boost felting properties or prevent fabric shrinkage. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3531

HTCC-Modified Nanoclay for Tissue Engineering Applications: A Synergistic Cell Growth and Antibacterial Efficiency

This paper deals with the synthesis of a biocompatible chitosan ammonium salt N-(2-hydroxy) propyl-3-trimethylammonium chitosan chloride (HTCC) and using it in montmorillonite ion-exchange process. HTCC-modified montmorillonite (Mt) with different chemical ratios was successfully synthesized, and their characteristics have been verified by XRD and FTIR analyses. Produced samples have been evaluated in terms of antibacterial efficiency and biocompatibility (cell culture test). Antibacterial efficiency of synthesized HTCC/Mt samples has been confirmed against both gram negative bacteria (Escherichia coli) and gram positive bacteria (Staphylococcus aureus). The results disclosed that the antibacterial efficiency of HTCC-modified montmorillonite was unexpectedly even more than HTCC. This excellent synergistic effect has been referred to entrapping bacteria between the intercalated structures of HTCC-modified montmorillonite. Then HTCC on clay layers can seriously attack and damage the entrapped bacteria. An extraordinary biocompatibility, cell attachment, and cell growth even more than tissue culture polystyrene (TCPS) have been recorded in the case of this novel kind of modified clay. Due to existing concerns about serious and chronic infections after implant placement, this natural-based bioactive and antibacterial modified clay can be used in electrospun nanofibers and other polymeric implants with promising mechanical properties for tissue engineering applications

A Key Major Guideline for Engineering Bioactive Multicomponent Nanofunctionalization for Biomedicine and Other Applications: Fundamental Models Confirmed by Both Direct and Indirect Evidence

This paper deals with the engineering multicomponent nanofunctionalization process considering fundamental physicochemical features of nanostructures such as surface energy, chemical bonds, and electrostatic interactions. It is pursued by modeling the surface nanopatterning and evaluating the proposed technique and the models. To this end, the effects of surface modifications of nanoclay on surface interactions, orientations, and final features of TiO2/Mt nanocolloidal textiles functionalization have been investigated. Various properties of cross-linkable polysiloxanes (XPs) treated samples as well as untreated samples with XPs have been compared to one another. The complete series of samples have been examined in terms of bioactivity and some physical properties, given to provide indirect evidence on the surface nanopatterning. The results disclosed a key role of the selected factors on the final features of treated surfaces. The effects have been thoroughly explained and modeled according to the fundamental physicochemical features. The developed models and associated hypotheses interestingly demonstrated a full agreement with all measured properties and were appreciably confirmed by FESEM evidence (direct evidence). Accordingly, a guideline has been developed to facilitate engineering and optimizing the pre-, main, and post-multicomponent nanofunctionalization procedures in terms of fundamental features of nanostructures and substrates for biomedical applications and other approaches

Frequency of Orthodontic Extractions and Malocclusion-Related Factors in a University Setting During a 25-Year Period: Frequency of Orthodontic Extraction and Influential Factors

Objectives The decision regarding orthodontic tooth extraction or dental arch expansion is an important yet challenging topic in orthodontic treatment planning. However, studies in this respect are limited In Iran. This study aimed to assess the frequency of orthodontic tooth extractions and the role of malocclusion-related factors that affect the frequency of orthodontic extractions in a university setting during 25 years. Methods This descriptive retrospective study evaluated 1,222 records of patients who underwent fixed orthodontic treatment in Shahid Beheshti Dental School from 1994 to 2018. The frequency of tooth extraction, type of malocclusion, and age and gender of patients were analyzed by the Chi-square test. The correlation of quantitative and qualitative variables related to occlusion (overjet, overbite, space discrepancy, cross-bite, A point–nasion–B point angle, mandibular plane angle, canine relationship, molar relationship, and the Curve of Spee) with orthodontic extraction was analyzed by the binary logistic regression. All statistical analyses were performed by SPSS version 21. Results The frequency of orthodontic extraction decreased from 1994 (74.5%) to 2018 (41.6%). The highest frequency of orthodontic extraction (60%) occurred in class II division I malocclusion cases. Frequency of orthodontic extraction in the age group of 12-20 years was significantly higher than in other age groups (P=0.003). The odds of orthodontic extraction increased by an increase in overjet (P=0.036) and in class II malocclusion cases (P=0.05), and decreased by an increase in overbite (P=0.020). Conclusion Tendency to orthodontic extraction has decreased in contemporary orthodontics in Shahid Beheshti Dental School. In addition to the degree of dental crowding, the decision regarding orthodontic extraction also depended on overjet, overbite, and type of malocclusion

Comparison of luteal phase stimulation with follicular phase stimulation in poor ovarian response: a single-blinded randomized controlled trial

Abstract Background In the last decade, luteal-phase ovarian stimulation (LPOS) has been suggested as an alternative controlled ovarian stimulation (COS) protocol for in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) cycles mainly in women with a history of poor ovarian response (POR). The present randomized controlled trial study aimed to compare the outcomes of follicular phase ovarian stimulation (FPOS) and LPOS protocols in POR cases undergoing ICSI cycles. Methods Seventy-eight POR patients who met the Bologna criteria and underwent an ICSI cycle were included. In this study, 39 POR cases were allocated to the FPOS group, and 39 POR cases were allocated to the LPOS group. The primary outcome was the number of metaphase II (MII) oocytes. In addition, the total number of oocytes, number of top-quality day 3 embryo, day 3 embryo development rate, chemical pregnancy and clinical pregnancy rates were defined as secondary outcomes. Results The obtained results demonstrated that the number of MII oocytes significantly increased in the LPOS group compared to the FPOS group (P = 0.007). However, there was no significant difference between the two groups regarding the number of GV and MI oocytes, number of top-quality day 3 embryos and day 3 embryo development rate among both categories of patients. Also, the number of total and MII oocytes was significantly higher in the LPOS group (P = 0.016). Conclusion These results suggest that LPOS protocol effectively increases the number of mature oocytes in women with a history of POR. Trial registration IRCT20210405050852N1 (Registered at Iranian registry of clinical trials; available at https://en.irct.ir/trial/55402 )

Preface

Because of the travel restrictions between China and other countries of our keynote speaker, the 9th annual 2021 International Conference on Material Science and Environmental Engineering [MSEE2021] was held on November 27th, 2021 (Virtual Conference). The conference was held via Tencent Meeting Application. MSEE2021 aims to bring researchers, engineers, and students to the areas of Material Science and Environmental Engineering. MSEE2021 features unique mixed topics of Material Science and Advanced Materials, Material Engineering and Application, Environmental Science and Engineering and Mechanical Design and Technology. We received over 197 submissions from various parts of the world. The Technical Program Committee worked very hard to have all manuscripts reviewed before the review deadline. All the accepted papers have been submitted to strict peer-review, and selected based on originality, significance and clarity for the purpose of the conference. The conference program is extremely profound and featuring high-impact presentations of selected papers and additional late-breaking contributions. We sincerely hope that the conference would not only show the participants a broad overview of the latest research results on related fields, but also provide them with a significant platform for academic connection and exchange. There are two keynote speakers and four invited sessions. The keynote speakers are internationally recognized leading experts in their research fields, who have demonstrated outstanding proficiency and have achieved distinction in their profession. The proceedings would be published by IOP Journal of Physics Conference Series. We would like to express our sincere gratitude to all the members of Technical Program Committee and organizers for their enthusiasm, time, and expertise. Our deep thanks also go to many volunteers and staffs for the long hours and hard work they have generously given to MSEE2021. Last but not least, we would like to thank all the authors, speaker and participants for their great contributions to the success of MSEE2021. MSEE2021 Organizing Committee List of Committee of MSEE2021 are available in this pdf.</jats:p